When it comes to cabbies, London stands out from the herd. The city’s taxis are uniquely built and feature a generous siting space and an impressive performance to match.
Most of these autos are private property, and they cost anywhere around £28,000. However, you can also lease one of these diesel powered autos and make somewhere between £18,000 and £40,000 annually.
The reason why London cabbies are black is not clear-cut. But it is mostly a cost issue. Since black cabbies come at a standard price, while other colors are considered 
as extras. So most people in the taxi business stick with black for uniformity and to save on cost.
London cab drivers have an equivalent knowledge to a master’s degree in driving. The city has well over 200 streets, and the black cab drivers spend a whopping four years learning this and many other things about the industry.
At the end of the training, the drivers are tested and rewarded with licenses. A green badge, for example, is like a first-class honor. It gives the driver a permit to ferry passengers anywhere within the city. Yellow badge drivers, on the other hand, are limited to a specific areas.